An act of love between two men, where one male ejactulates on the butthole/crack of the other after anal intercourse. The semen is then allowed to dry, after which a standard 'rusty trombone' is performed on the newlydried 'crusty' asshole.

After he reemed my cornhole, he gave me a nice crusty trombone which not only gave me phallic pleasure, but soothed my sore asshole.